david scott, nbc news, west, texas. >> still a lot of unanswered questions, but we will continue to bring you the story and bring you live updates from texas throughout the show. right now, why don't we get to the latest on that investigation into boston. >> let's get to that investigation into the boston marathon bombing. a suspect has been spotted on security video taken before the two blasts, but no arrest has been made. cnbc's senior correspondent skoet cohen is live in boston. i has the latest for us. good morning, scott. >> good morning, andrew. let me correct you, it is not necessarily a suspect that authorities are talking about, but it is certainly somebody that they want to talk to. on the south end of boston at the cathedral of the holy cross, people are lining up for an interface memorial service that will begin five hours from now at 11:00 eastern time, featuring president obama. massachusetts governor and the boston mayor as well as yoyo ma, and mitt romney, long time boston resident will be in attendance. meantime, all around downtown, memorials are cropping up, makeshift m